Steam-generator.



Patented lan. I, |90I.

No. 654,88i,

T. MILLER.

STEAM GENERATOR.

(Application filed Mar. 27, 1900.)

Tn: Ncnms PETER: co, Fumo-dmc.. wAsmNc'reN, D. cA

Tl-IEODORE MILLER,

OE NEW YORK, N. Y.

STEAM G ENERATO R.

SPECIFICATION forming part of Letters Pat-ent No. 664,881, dated January 1, 1901.

Original application filed January 25, 190D, Serial No. 2,714.

Divided and this application filed March 2'7, 1900. Serial No. (No model.)

To @ZZ wwnt it ntay concern:

Be it known that L THEODORE MLLER, a citizen of the United States, and a resident of New York city, county and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

rihis invention relates to an improved steam-generator, and particularly to means whereby the heat admitted to the shell of the boiler, which contains the steam-generating tubes, may be accurately controlled, the present case being` a divisional application of the one filed January 25, 1900, under Serial No. 2,714.

ln the accompanying drawings, Figure lis a vertical central section, partly in elevation, of my steam-generator. Fig. 2 is a vertical section through the lower part of the same,

showing the damper in a different position; and Fig. 3, a horizontal section online 3 3, Fig. l.

The letter Ct represents the shell of the generator, within which is contained a coiled tube b or a series of communicating tubes, within which the steam is generated. This tube communicates at one end with the feed-water pipe c, while at its other end the steam generated is carried to the engine by pipe d, having pressure-gage d and blow-off cock d2.

The generator may be heated in any manner desired, the nre-chamber or source of heat 7L being arranged below the shell d. The shell is separated from the fire-chamber bya perforated register composed of two perforated plates ef, of which one-say the upper plate e-is rotatable to constitute a damper, while the lower plate f forms a perforated bottom that extends underneath the entire shell a, and thus constitutes a perforated partition between the steam-generating chamber and the fire-chamber.

The damper has a perforated extension e projecting over a perforated side f of the tire-chamber, that communicates with a bypass flue g. The arrangement of perforations is such that when heat is admitted from the fire-chamber to the shell a the flue gis shut off, and vice versa.

The damper c is operated by a handle e2,

which likewise controls the blow-off cock d2 by elbow-lever e3, link e4, and lever e5 in such a manner that the cock is closed when the heat is directed into the shell a and opened when the heat is directed into the flue g.

To start the generator, the fireplace is first put in communication with the flue g to obtain a good draft and to indirectly warm up the generator-coil h by the heat radiated or conducted through the closed register-plates e and f, and then the damper e is turned to disconnect the flue and to direct the heat into the shell ct, so as to thoroughly heat the tube b. In this way the gases of combustion are brought into contact with the generator-tube b only after the latter has been well heated, and thereby the condensation of moisture and the precipitation of soot on the generator-tube b are prevented. When no steam is required for any length of time,the damper c is turned, so as to shut off the heat from the shell a and deflect it into the iiue g, while simultaneously the blow-odi' cock d2 is opened, whereby the boiler is relieved entirely of steam-pressure and danger of explosion is avoided. l

It will be seen that in my improved generator the heat admitted to the shell may be accurately controlled and that'by properly setting the damper the heat or any excess thereof may be deiiected i-nto the flue g.

What I claim is- A steam-generator composed of a steam-generating chamber having aperforated bottom, a fire-chamber adapted to communicate .with said steam-chamber through said bottom,aloy pass flue,a perforated wall between fire-chamber and iiue, and a perforated damper that eX- tends over the perforated bottom and over the perforated wall, said damper being adapted to direct the heat either into the generating-chamber or into the flue, substantially as specified. Y

Signed by me at New York city, county and State of New York, this 26th day of March, 1900.

THEOD ORE MILLER.

Witnesses Fry. BRInsnN, WILLIAM MILLER. 

